Quotethe_digital_dentist Quoteimqqmi Due to the nature of corexy it can do some weird motions like this, stair casing etc. What is in the nature of corexy that can cause stair-stepping? If either motor misses steps the layers shift diagonallyby ruyvieira - CoreXY Machines
I'm dumb so I didn't read the entire thread yet, did you do any of the actual aluminum cutting on your OX? What kind of spindle do you use? I'm building an OX as well and ordered a 500w brushless spindle but I don't really expect doing any metal cutting without implementing flood cooling before because I know milling aluminum is really messy.by ruyvieira - CoreXY Machines
It would be pretty bad if the next gen 3d printer controllers used the same form factor as Arduino Mega + Ramps. It would be so much better if they employed a solution like Tiertime's boards, where there's a base board and a CPU with just the microcontroller. If I'm not mistaken they also use a STM32 mcu. I designed a board for the STM32 bluepill boards, but it's for running GRBL. I see that therby ruyvieira - Controllers
QuoteMKSA Quoteruyvieira I've seen some printers with linear rails mounted on MDF, which is quite possibly the worst material someone could use. As long as it doesn't change shape over time, it's good enough I guess, and that's why I asked about plywood. If it's marine grade it won't suffer with humidity or temperature changes. Maybe adding a facing operation to make it flatter would make it flaby ruyvieira - Mechanics
At 48v it becomes a 120w heater, so it will heat up very quickly (similar to 12v heater cartridge on 24v, I did this for a long time with no issues), but not straight out kill it. There are recorded cases of chinese heater cartridges melting the aluminum blocks they're inserted into (which means they can get over 660ÂșC) and remaining visually intact after being left on for hours, so take that asby ruyvieira - Let's design something! (I've got an idea ...)
QuoteMKSA Eager to see a Delrin frame plus linear guides 3D printer. Will be a first. How comes nobody thought about it ? I've seen some printers with linear rails mounted on MDF, which is quite possibly the worst material someone could use. As long as it doesn't change shape over time, it's good enough I guess, and that's why I asked about plywood. If it's marine grade it won't suffer with humiby ruyvieira - Mechanics
Quotethe_digital_dentist Quoteruyvieira Could also work as an air hockey robot I think it's a little too slow for that. The fastest I've been able to run it is about 700 mm/sec. I think it's set to 300 mm/sec in the video. That's very easy to solve, heh Just not cheap Someone else did using a regular Ramps and a webcam for computer visionby ruyvieira - CoreXY Machines
Could also work as an air hockey robotby ruyvieira - CoreXY Machines
Quotethe_digital_dentist Duct tape all the way. Or zip-ties. Why on earth would anyone make something out of wood or acrylic and then try to put linear guides on it? Cheaper than flat milled metal plates and not as bad as MDF QuoteVDX ... I've made some of my micro-assembly stages from POM/Delrin and used mini linear guides with PZT motors ... was precise/accurate enough for accuracies below 1by ruyvieira - Mechanics
QuoteMKSA Quoteruyvieira I've done it before on aluminum extrusions and rolled aluminum plates which is a less than ideal solution, and it works. In the beginning there's a bit of resistance, but over time this resistance goes away as the balls wear down the rails. Now, how about other materials, like plywood and acrylic? Would I need something in between the linear rails and the sheet (e.g: a shby ruyvieira - Mechanics
This is what your description brings me to mindby ruyvieira - Mechanics
I've done it before on aluminum extrusions and rolled aluminum plates which is a less than ideal solution, and it works. In the beginning there's a bit of resistance, but over time this resistance goes away as the balls wear down the rails. Now, how about other materials, like plywood and acrylic? Would I need something in between the linear rails and the sheet (e.g: a sheet of EPDM rubber) to acby ruyvieira - Mechanics
QuoteDiggrr The Leapfrog Bolt is an independent IDEX printer. Both heads are on the same X&Y, but capable of dividing the bed between them to print two (identical or mirrored) parts simultaneously from two different materials, as well as the usual two color/material printing we're used to seeing. Getting closer. Fun printer to watch, too! Oh, and they say the chicken came first...the proteinby ruyvieira - CoreXY Machines
That would be very useful as a laser cutter for textilesby ruyvieira - CoreXY Machines
Very nice. Good to see more people going the H-BOT way.by ruyvieira - General New Machines Topics
Quoteo_lampe You save a little money over machined extrusions, but it'll be a hell of a time to align the frame and it'll cost you more when you have to buy special measurment tools. You only have to buy the tools once and making a series production would eventually even out the bill. But series production of printed parts, were some parts need filing is no fun. Add the extra working hours to theby ruyvieira - CoreXY Machines
@Kewtdz that's how I got my 200/150mm rails. I asked two aliexpress sellers for custom lengths and they did it for me.by ruyvieira - CoreXY Machines
JoergS5, you need to take into account that these guides are not really intended for precision sub-microscopic work. We're using a component that is just as likely to be employed in a insole-making machine. They're also supposed to be mounted to flat-milled surfaces (i.e: for example the E3D's toolchanger demo machine), and a lot of people are bolting them to aluminum extrusions (like I am), whicby ruyvieira - CoreXY Machines
QuoteDiggrr I like it! Personally, I think H-bot gets a bad rap from people using 8mm smooth rods and printed axis parts, throwing rigidity out the window (for any printer design, really). Curious as to what you've found with the Chinese clone rails. I've not tried them for all the horror stories.. I'm glad you liked it. The h-bot design is used in a lot of industrial pick and place machines thby ruyvieira - CoreXY Machines
Hello, gentlemen, thanks for letting me in. This is my h-bot design (yes, I know what you're going to say about racking, but so far this has been a non-issue). I could turn it into a CoreXY with a few extra bearings, but at the moment I would rather not. Components are mostly china-made or chinese clones (Rumba, E3D, MK8 extruder). The design was inspired by several other printers (leapfrog creaby ruyvieira - CoreXY Machines